1938354442 has 8 divisors (see below), whose sum is σ = 2908777536. Its totient is φ = 968761932.

The previous prime is 1938354413. The next prime is 1938354443. The reversal of 1938354442 is 2444538391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1938354442² = 7514435885642262728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1938354443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201778 + ... + 211165.

It is an arithmetic number, because the mean of its divisors is an integer number (363597192).

Almost surely, 2^1938354442 is an apocalyptic number.

1938354442 is a deficient number, since it is larger than the sum of its proper divisors (970423094).

1938354442 is a wasteful number, since it uses less digits than its factorization.

1938354442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415292.

The product of its digits is 414720, while the sum is 43.

The square root of 1938354442 is about 44026.7468932239. The cubic root of 1938354442 is about 1246.8409707796.

The spelling of 1938354442 in words is "one billion, nine hundred thirty-eight million, three hundred fifty-four thousand, four hundred forty-two".